This Recommendation defines architectural requirements for the edge-to-edge management and/or control of client services transported over various transport network topologies and technologies. The services for which such management capabilities are required are included. The requirements for the transference of the management and/or control data between the edge points is described along with the requirements for accessibility to management and/or control information at some point in the network, other than the end point. The provision of such management services is also considered in the context of business relationships that may be involved in the delivery of a service to, for example, the Service Provider, Network Operator(s) and the Enterprise End customer. Consideration is also given to the management and/or control of Customer Located Equipment which is owned by the Service Provider and carrying said services. Although the client service management detail is not within the scope of this recommendation, consideration is given to three generic management and/or control functions: performance reporting, status reporting and client service control (e.g. loopback, end node configuration etc). This Recommendation describes the architecture for service management and/or control, and includes the reference points of the architecture. It does not define the implementation methodology or any of the interfaces that may need to be specified.